/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/GenericPlatformInputDeviceMapper.h
Change the user mapping of the given input device from an old user to a new one. This will broadcast the OnInputDevicePairingChange delegate. Use this when you know that an input device is already mapped, but it has changed platform users This should be called by the platform's implementation.
True if the device was successfully remapped
virtual bool Internal_ChangeInputDeviceUserMapping ( [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) DeviceId, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) NewUserId, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) OldUserId )